Metal roofings



14, 1958 G. H. HUNTINGTON 2,355,871

- METAL ROOFINGS Filed April 6, 1,953 2 Sheets-Sheet 2 United States Patent METAL ROOFINGS Glen H. Huntington, Denver, Colo.

Application April 6, 1953, Serial No. 346,850 1 Claim. or. 108-21 This invention relates to sheet metal roofing, and more particularly to means for attaching sheet metal roofing of the type describedin applicants prior Patent No. 2,408,557. The principal object of the present invention is to provide highly efilcient means for securing sheet metal roofing strips to a roof which will allow free longitudinal expansion of the strips, and which will avoid the use of special attachment clips and which will avoid all nail holes or other apertures which might cause leakage in the roofing.

Another object is to provide sheet metal roofing attachment means which will form a tight, weatherproof joint between adjacent roofing strips, and to provide a covering batten strip for the joints between the roofing strips which can be quickly and easily snapped into place without the use of tools.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efiiciency. These will become more apparent from the following description.

In the following detailed description of the invention, reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. 1 is a fragmentary, perspective view, illustrating the various steps in applying a sheet metal roof with the use of the improved attachment means;

Fig. 2 is an enlarged, perspective view of a partially assembled joint in the roof of Fig. 1;

Fig. 3 is a similar view, illustrating the joint completely assembled;

Fig. 4 is a still further enlarged cross-section through the completed joint of Fig. 3, taken on the line 44, Fig. 1;

Fig. 5 is a fragmentary, perspective, end view of an alternate form of roofing strip;

Fig. 6 is a similar view of a batten strip employed in the invention; and

Fig. 7 is a cross-section through a joint of the assembled alternate form of roofing strip and batten strip.

The particular roofing to which this invention applies consists of elongated roofing strips 10 of sheet metal, such as sheet aluminum or the like designed to be applied over any suitable supporting structure, such as sheathing boards 12. Each of the strips is provided with continuous, upturned flanges 11 along its opposite edges. This invention is for the purpose of attaching the strips 10 to the supporting structure 12. The improved attachment means employes two elements, an attachment trough 13 and a batten strip 14 for covering the trough 13.

The attachment trough 13 is formed from an elongated strip of sheet metal which is bowed upwardly along its longitudinal medial line to form a bottom arch 15 provided with slotted nail holes 16. At each side of, and

in parallel, spaced-relation to the bottom arch 15, the

ice

ing surface, the hooked edges 20 will be spaced above a the supporting surface. s

When installing the roof, the roofing strips 10 are placed in parallel spaced-relation, as shown at the left of Fig. 1, with their adjacent flanges 11 extending upwardly in parallel relation. The attachment troughs 13 are now placed over the spaces between the flanges 11 of the adjacent strips and are forced downwardly thereon to cause the flanges 11 to enter between the hooked edges 20 and the flanges 18 of the attachment strips.'

The latter are forced downwardly until the troughs 13 rest upon the sheathing boards 12 to which they are nailed by means of suitable nails 21 positioned in the slotted nail holes 16 at suitable intervals.

It will be seen that the strips 10 are free to expand and contract longitudinally under thermal changes, since the flanges 11 are free to slide longitudinally between the side portions 19 and the flanges 18 of the trough 13. The trough itself may also expand and contract under temperature changes, since the slotted nail holes 16 allow relative movement between the trough and the nails. The natural resiliency of the metal of the trough maintains weather tight joints between the hooked edges 20 and the flanges 11 of the roofing strips.

The batten strip 14 is employed to exclude weather from the trough. The batten strip also comprises an elongated strip of sheet metal bent to incline downwardly at each side of its longitudinal medial line to form a hipped top having two side flanges 22, each of which terminates along its bottom in an inwardly extending book 23.

The batten strips are installed by simply placing them on the troughs 13 and pressing them downwardly thereon. The flaring, inclined side portions 19 of the trough serve to wedge or pry the side flanges 22 of the batten strip 14 outwardly until the hooks 23 of the batten strips snap beneath the hooked edges 20 of the trough, as shown in Fig. 3. This firmly locks the batten strips" in weatherproof engagement with the troughs 13, and yet allows free relative longitudinal expansion of both.

It will be noted that no tools are required other than a hammer to drive the nails 21, and that no solder sealing compounds or other work is necessary to provide a weather-tight expansion joint for securing the roofing strips 10 to the sheathing boards 12.

In Fig. 5 an alternate form of roofing strip is illustrated comprising an elongated strip of sheet metal 24 which is turned upwardly and inwardly along its longitudinal edges to form ho'oking'sockets 25. From each hooking socket the metal extends upwardly and outwardly, forming an inclined surface 26 at each side of the strip. From the upper extremity of each inclined surface the metal is turned downwardly to form vertical side flanges 27, thence outwardly to form attachment edges 28. The attachment edges are indented upwardly along their medial lines, as shown at 29. The upwardly indented portions are provided with elongated nail holes 30 for receiving nails 32.

The alternate form of strip employs the batten strip 14 similarly to the previously described form. The alternate form is laid upon the roof sheathing 12, with the attachment edge 28 of one strip overlying the attachment edge 28 of the adjacent strip so that the indented portions 29 of the two strips interfit and align them:

selvesyas' shown in Fig. 7. The batten strip 14 is then forced downwardly over theparallelinclined surfaces 26 of the two adjacent strips until the hooks 23 on the batten strips snap into the hooking notches 25. This securely fastens the batten strips in place and provides a weather-tight, elongat'edcompartment 31 over the overlapped-edges .28 and the nails 32-.

It-will be noted the two forms are very similar when finally assembled. In the alternate form, however, the trough 13 of the previous form is incorporated" as part of the roofing strip per se.

While a specific form of the improvement has been described" and illustrated herein, it is to be understood that the same may be varied, within the scope of the appended claim", without departing from the spirit of the invention.

' Having thus deseribed 'the invention, what is claimed and desiredsecured-by Letters Patent is:

A sheet metal roofing construction comprising aplurality of'longitudinally extending sheet metal strips disposedupon a supporting structure,-each strip having a longitudinally extending verticalfla'nge on each side edge thereof, theadjacent flanges of i adjacent strips being in: spaced parallel relation and providing pairs thereof, and means engageable with said supporting structure and each pair of flanges for holding the strips in proper roof-forming: position, said means comprising an attachment trough member including a centrally disposed outwardly arched portion provided in the crest thereof with a" longitudinal: series of longitudinally disposed nail =holes; a plane portion at each side of said arched portion and engaging said supporting structure, plane portions extending" laterally and upwardlyfrom the outer edges of said supporting structure engaging portions in angular relation thereto, a flange projecting vertically upwardly from each of said angular portions and being in engagement with the inner face of a respective one of said strip flanges, said last mentioned flanges being extended laterally outwardly over the ends of said strip flanges and merging into side portions externally of said strip flanges which projcct downwardly in diverging rela tion to the strip flanges and which are provided with hooklike edges engaging said strip flanges externally thereof. and a batten strip including a portion spanning said strip flanges and side flanges engaging the outer walls of said downwardly diverging portions and terminating in inwardly directed hooks disposed beneath said hooklike edges of said downwardly diverging portions and in contact therewith References Citedrin theflle of this patent UNITEDSTATES PATENTS Australia Oct; 16; 1950 

